Forging machine



Jan. 5, 1937. P, H NAST 21,066,360

FORGING MACH-INE Fiid April 28, 1934 2 sheets-sheet 1 y v lm? 4W Jan. 5, 1937. P. H. NAsT v2,033,360

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HillV lllilll'lu,III wml Y; Il I |U mi l a" f @0 Il l1 `Patented Jan. A, 1937 UNITED STATES FORGING MACHINE Paul H. Nast, Claremont, N. H., assignor to Sullivan Machinery Company, a corporation of Massachusetts Application April 28, 1934, Serial No. 722,925

19 Claims.

,This invention relates to a forging machine, and more particularly to a forging machine for use in making or reforming cutter bits for cutter chains or coal cutting mining machines, and the 5 like.

An object of this invention is to provide an improved forging machine. Another object is to'L'provid'efan improved forging machine for making` orreforming mining machine cutter bits andthe like. A further object is to provide an improved cutter. bit: forging machine of the impact-Ltype, Yet another object is to provide an improyedforging machine in which a cutter bit, orv,gener ally.similar article, is formed by a succession o fjimpact blows. A still further object Iistoprovide an improved cutter bit forging machine ;having ,improved bit forming die mechanismand 'associated gaging means. A further object is' :to ,provide an improved die block strucgoiiturefor afforgingmachine of the abovecharacter.-,A- still further object is to provide an improvedfcutter bit forging machine which is relativelyl light in` weight and simple in structurejfandzwhich may be readily operated by an ;,unsk-illed loperator. These and other objects wim-however, hereinafter more fully appear in the course of the following description and as morefparticularly pointed out in the appended claims. 303i.. llnthe accompanying drawings there is shown for purposes of illustration o-ne form which the invention may assume in practice.

'Ingthese drawings,- Fig. l, is a Vertical sectional View taken through 3fi'.ethey illustrative form of the improved forging machine,showing the die and hammer mechanismfin forging position.

Fig, `2 is a cross sectional view taken on line 2-.2 of Fig.- 1. 40.1.. Fig. 3 is anenlarged vertical sectional view takengonline 3-3 of Fig. 1.

Fig.i 4 is a View similar to Fig. 3 showing the parts. in releasedposition.

Fig. 5;is'a.vertical sectional view taken on 45f1ir1,e.4 .3.;

Eig.y 6..is an end elevation of the upper die Iilolx.I

Fig. 7 is a side elevation of the die block shown in Fig. 6.

Fig. 8 vis 4an end elevation of the lower die mechanism.

Fig.9,is.\a1side elevation of the die mechanism shown in Fig. 8.

'Ifhetillustrative embodiment.` of the invention .5e-.comprises apedestal I. having a base 2 and supporting an impact mechanism generally designated 3 and a gaging mechanism 4.

The pedestal of the machine comprises a 6, 6, the latter suitably secured to a pair of foot portions 'I forming the pedestal base. The top portion 5 of this frame is provided with a suitably formed recess 8 for the reception of a stationary upper die block 9 held in position within the recess by a pin IIJ and a cooperating clamp I I, which is made of spring steel and bent to a radius so that tightening of bolts I2 will clamp the die block. Cooperating with this stationary die block is a lower movable die block I3 which has vertical rectilinear movement and is guided in a vertical guideway I4 formed between the side frames 6, 6 of the machine frame.,

In this illustrative construction the impact mechanism comprises a vertical hammer motor I5 of the pressure fluid actuated percussive type and is guided between the side portions of the frame by its upwardly projecting sleeve portion I6 in an annular guide Il suitably secured to the lside portions of the frame. This motor com prises a cylinder I8 having a bore I9 containing a reciprocable hammer piston 2D. This cylinder has upper and lower heads 2I and 22, the former herein preferably formed integral with the sleeve portion I6. The lower head 22 is provided with a bore 23 in which a coiled spring 24 is housed, and this spring at its upper end reacts on thelower head and at its lower end upon a head 25 guided in the bore 23 and formed integral with l a rod 26 which is pivotally connected at 21 to one end of a pivoted foot lever 28. This lever is journaled at 29 on a pin carried by the pedestal frame and has a pedal or foot plate 30 at its opposite end by means of which the lever may be depressed. Projecting from the end of the lever 28 to which the rod 26 is pivotally connected is a stop portion 3I limiting the downward movement of the die actuating hammer motor; and on its upper surface the lever is provided with a valve stem engaging portion 32 which engages the plunger 33 of a valve (not shown) in a valve body 34 suitably secured to the pedestal frame; and this stem engaging portion opens the valve on suiicient downward movement of the pedal 30 of the lever, thereby admitting pressure fluid to a flexible connection 35 leading to the valve chest 3G of the die actuating hammer motor; and pressure fluid is adapted to be distributed from this valve chest to the motor cylinder to Veii'ect reciprocation of the hammer piston. lThe hammer piston of this hammer motor has a striking bar 31 guided in the bore 38 of the sleeve portion I6 of the motor guide, and this striking bar is adapted to transmit hammer blows to the lower forming die block.

The lower die block I3 is retained in its guide by a guide plate 48 secured by bolts 4I to a plate 42, the bolts I2 of the clamp II also being secured tothis plate 42. The plate 42 is also formed with an opening 43 which'receives one end of the holding pin I0. rl'.'he lower die block I3 rests upon the upper end of the sleeve portion I6 of the hammer motor and is entirelysupported and actuated by the hammer motor.

Now referring to the improved die structure, it will be noted that formeddrrthe v lower die block I3 is an angularly disposed narrow slot 45 of a width adapted to receive'the shank'46` of a cutter bit 41, and formed integral with the upper surface of this die block is a die portion 48 having a forming surface 49 adapted to form the forward 'cutting surface of the cutter bit.

Arranged in a transverse s'lot` 50 in thek upper die'block 9 is a hardened metal plate 5I forming the die portion for the rearwardly inclined sura this plane' surface forms a vreaction surface against which 'the bit reacts during forging of the cutting portion of the bit. The sides of the cuttingportion of the bit 4arerformed by concave surfaces formed onlaterally movable .fdie' members 56, 56; These die members are mounted on a transverse pin 51arranged in a bore' 58' formed in the lower die block I3 and are guidedby horizontal yplane surfaces 59 thereon engaging corresponding plane guiding surfaces son' the' die block." 'I'hese die members 56 are provided with depending ear-like portions 66 having"apertures 6I through which the ends of this pin project. Interposed between the body offthejdieblock I3 and the Vinner sides of the A.depending portions 60'of these die members are co'ilefd" springs 62, 62 for normally urging the die members intotheir outermost released position. These' dieY members' are also provided with `outer inclined'surfaces 63`adapted to engage with wedge' surfaces" 64 formed on' the inner sides 'of depnrling'portion's 65 'integral 'with the upper. dieblock 9. The die portion 48A fof the lower die blockr I3 is formed with convex sides' shaped toc'onformv'w'iththe concave surfaces 55 of the forming' diemember's' 56 are driven inwardly in planes'at right angles to the planes of movement of theflowerl' die block ytowardfone lanother. Aby

the' wedge surfacesf64 ,on the upper v'die block,v

and 'as thehammer motor vpercussively actuates the lowerdie block' I3 the side forming die members 56:', are rdriven inwardly 'to' y form the ,side

'su'f'cesfof the cutting portion ofjtriejcutteypit,

shown in Fig. 4, theA coil springs 62^ moving the side' forming 4die members laterally into their outermost released position shown...

The improved bit gaging means comprises a rack member 61 guided at 68, 68 in a bracket 69 suitably secured to the cylinder I8 of the hammer motor and movable upwardly and downwardly with the hammer motor. This rack member is provided at its upper end with an abutment surface 10 formed to engage the lower surface of the cutter bit shank so that when the cutter bit is informing position it is supported by this rack member. A guideway 1I is formed in the transverse portion 12 of the guide plate 4Ilfor guiding the upper end of this rack bar. For moving the rack bar` axially to adjust the position of the bit engaging surface 18 there are formed thereon` rack teeth 13 engaged with the teeth of the gear segment 14 secured to a shaft 'I5 journaled'on the bracket 69. Also secured to this shaft is an operating lever 11, and pivotally mounted on this lever is a lever 18 for operating a latch 19 engageable with a ratchet segment 80 secured tothe bracket 69.' VIt will thus be seen that when the lever" is,1 swung in`V4 one direction or theother the. rack bar]k maybe slid either upwardly.V or downwardly.; as desiredand the latch 19 engaging j the teeth of theuiaof; ratchet segment holds therack bar in adjusted position. r

As a result of this invention, it will 'betnoted that animproved cutterbit forging*xrnacliinefil-fv provided having improved v,dieA mechanism where@ Y" by the cutting portion ofthe; cutter` bit is fformed El in an improved mannertbya hammeringfactlonl It will further be notedlthatfthe improved{orsi--v ingmachine. is of a comparativelyiasiniplev and'`r` rugged constructionhwhich may becheaply manv ufactured andv maintalnedlinrepair ata-I mum of expense.. Theserandzother-use's''and vantages of thev improved 'forgingwmachine be .clearly apparent to thosesskilled fin the While there .is inthis vapplication yspecifically-III-f5: described one form which the invention sume .in practice, it Awill be understoodV vthat fr fom of the same isshownffor purposes of-illusd tration and that the..inventionUmay-bemodied-f and embodiedin variousother forms Vwithout de- 2465.1' parting from its spirit. or :the `scope :of the lap-1 pendedclaims. a i l What .AI claim as `newiandidesiretolseeurel-'lay Letters Patent is: t v Y 1. In.a cutter bit-.forging machine, alstationary y"lilla die member, a cooperatingmovableldiesaid die members having die surfaces-I Ii'orl -i'ol'm- L ing the forward cutting surface and receding surface of the cuttingportionpf alcutteribitifdie means carried by one of said die'members'havlngf f'- die. surfaces for.v .forming the side isurfacesiiof 1a, 1 cutter bit, and means forfactuatingtsaidfr'novable die member and said die means Atoni'olmin'g saidv side surfaces concurrently with said forward eut-u ting .surface and said receding surface; y 60.14.-

2. In a cutter bit forging machine, a statioxiariyca die. member, .a cooperatingl movable die member, said die members havingtdle surfaces-for form.-y

. ingv theV .forward cutting surface and Ireceding surface of the cutting portion of a cutter bit;a.nd 'ff die means` carriedby-said movable` diefxnember having die surfaces for forming the side surfnliesaf of ,thecutting portion offa cuttenbitr- 3. In a cutter bit forging machine, a dieiie'eh-Lii anism `for.formingthecutting portion of a cutte'r bit comprising a stationaryr die men'iberfml.V cooperating movable diefmember, and -cooperlbing die means carried by said movable die momma-1 and movable Ain planesat right' anglea-tothef. rection of movement of. said movable-di.. fr A 4. In a cutter bit forging machine, a die mechanism for forming the cutting portion of a cutter bit, a gaging mechanism for the cutter bit cooperating therewith during the forming of the cutting portion, and mechanism for effecting forging of a cutter bit by said die mechanism including means for feeding the same bodily into juxtaposition to the bit and animpact mechanism for actuating said die mechanism when so positioned.

5. In a cutter bit forging machine, a die mechanism for forming the cutting portion of a cutter bit, a gaging mechanism for the cutter bit, and an impact mechanism for actuating said die mechanism and mounted for movement into and out of die actuating position, said gaging mechanism being mounted for movement with an element of said impact mechanism.

6. Ina cutter bit forging machine, die mechanism for forming the cutting portion of a cutter bit'comprising a stationary die member, a cooperating die member movable toward and from said stationary die member, and laterally movable die elements carried by said movable die member.

7. In a cutter bit forging machine, die mechanism for forming the cutting portion o1' a cutter bit comprising a stationary die member, a cooperating die member movable toward and from said stationary die member, laterally movable die elements carried by said movable die member, and means for moving said last mentioned die elements laterally with a wedging action upon movement of said movable die member toward said stationary die member.

8. In a cutter bit forging machine, die mechanism for forming the cutting portion of a cutter bit comprising a stationary die member, a cooperating die member movable toward and from said stationary die member, laterally movable die elements carried by said movable die member, and wedge means on said stationary die member and cooperating with said laterally movable die elements for moving the latter laterally upon movement of said movable die member toward said stationary die member.

9. In a 4cutter bit forging machine, a stationary die member, a cooperating movable die member, said die members having portions for forming the forward cutting surface and receding surface of a cutting portion of a cutter bit, die means carried 'by said movable die member for forming the side surfaces of a cutting portion of a cutter bit, and means for moving said latter die means into forming engagement with the cutter bit with a wedging action upon movement of said movable die member toward said stationary die member.

10. In a cutter bit forging machine, a stationary die member, a cooperating movable die member, said die members having portions for forming the forward cutting surface and receding surface of the cutting portion of a cutter bit, die means carried by said movable die member for forming the side surfaces of the cutting portion of a cutter bit, and wedge means on said stationary die member and with which said die means is engageable for moving said die means into side forming engagement with the cutter bit upon movement of said movable die member toward said stationary die member.

11. In a cutter bit forging machine, a die mechanism for forming the cutting portion of a cutter bit, a gaging mechanism for the cutter bit, and an impact mechanism for actuating said die mechanism and mounted for movement into and out of die actuating position, said gaging mechanism being supported on and mounted for movement with an element of said impact mechanism.

12. In a cutter bit forging machine, die mechanism comprising a stationary die member, a cooperating die member movable towards and from said stationary die member, laterally movable die elements carried by said movable die member, stationary wedge means coacting with said laterally movable die elements for moving the latter laterally upon movement of said movable die member towards said stationary die member, to effect a forging action, means for moving said cooperating die member and laterally movable die elements toward said stationary die member, and means for imparting a hammering action thereon to effect the bit forging operation.

13. In a cutter bit forging machine, die mechanism comprising a stationary die member, a cooperating die member movable towards and from said stationary die member, a bit support moving with said movable die member, laterally movable die elements carried by said movable die member, stationary wedge means coacting with said laterally movable die elements for moving the latter laterally upon movement of said movable die member towards said stationary die member, to effect a forging action, means for moving said cooperating die member and laterally movable die elements towards said stationary die member, and means for imparting a hammering action thereon to effect the bit forging operation.

14. In a cutter bit forging machine, die mechanism comprising a stationary die member, a cooperating die member movable towards and from said stationary die member, an adjustable blt support moving with said movable die member, laterally movable die elements carried by said movable die member, stationary wedge means coacting with said laterally movable die elements for moving the latter laterally upon movement of said movable die member towards said stationary die member, to effect a forging action, means for moving said cooperating die member and laterally movable die elements towards said stationary die member, and means for imparting a hammering iaction thereon to effect the bit forging operaion.

15. In a cutter bit forging machine, die mechanism comprising a stationary die member, a cooperating die member movable towards and from said stationary die member, means for supporting the shank end of a bit movable with the movable die member and having a top surface for supporting the bit in oblique position, laterally movable die elements carried by said movable die member, stationary wedge means coacting with said laterally movable die elements for moving the latter laterally upon movement of said movable die member towards said stationary die member, to eifect a forging action, means for moving said cooperating die member and laterally movable die elements towards said stationary die member, and means for imparting a hammering action thereon to effect the bit forging operation.

16. In a cutter bit forging machine, a stationary die, a cooperating movable die member movable toward and from said stationary die, lateral die members supported for bodily movement with said cooperating die member towards and from said stationary die, and also, relative to said cooperating movable die member, towards said stationary die, means automatically operative to effect said latter movement as said several die members move toward said stationary die, and means forl initially thrusting said die members toward said die member and thereafter imparting a rapid series of hammer blows to effect cooperation of said die members with said stationary die in forging a bit.

1'7. In a cutter bit forging machine, die mechanism for forming the cutting portion of a cutter bit comprising a stationary die member, a cooperating die member movable toward and from said stationary die member, laterally movable die elements carried by said movable die member,V

means ,for-moving' said` dieA elements laterallypvith awuedging actionupon'movement of said movablediefmember towards said stationary die mem- Y belgrand rahammer motor lfor imparting in rapid sequence impact blows to said movabledie in emv-n v, ber and said die elements.

19. In a cutterbit forging machine,` die` nsmfir forming thecutting portionof a Vcutter bit comprising a stationarydie rr1, `ember,al co-v operating die member movable toward andifrcvxriii saidstationary die member, laterally movable die elements carried by said movable diel rnefiiibaear,`4 wedge means `on said stationary die member and; cooperating ,withsaid laterally lmovableudiexelei ments for moving the latter laterally upon .movefg ment .of :said movable die, member .towardssaid ,s

stationary diemember, and a hammery motorlfor imparting in rapid sequence impact blows to said movable diemember. and saiddie elements. l l:

`1 l PAUL. H.

Ulf

' CERTIFICATE 0F CORRECTION.

Patent Nou 2,066,560s Januar5r 5, 1957.,

PAUL H. NST.

`It is hereby certified that error appears in the printed specification or the above numbered patent requiringcorrection as follows: Page J4., first column, line l, claim 16; after the word "move" insert together; and that the said Letters Patent should be Aread withv this oorrection therein that the samevmay conform to the record of the case in the Patent 'Officeo Signed and sealed this 16th day of November, A. D., 1957.,

\ Henry Van Arsdale, (Seal) Acting Commissioner of Patents. 

